netdev - Re: Re: [RFC v3 11/11] vduse: Introduce a workqueue for irq injection

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Date:   Wed, 27 Jan 2021 17:00:52 +0800
From:   Yongji Xie <xieyongji@...edance.com>
To:     Jason Wang <jasowang@...hat.com>
Cc:     "Michael S. Tsirkin" <mst@...hat.com>,
        Stefan Hajnoczi <stefanha@...hat.com>, sgarzare@...hat.com,
        Parav Pandit <parav@...dia.com>, Bob Liu <bob.liu@...cle.com>,
        Christoph Hellwig <hch@...radead.org>,
        Randy Dunlap <rdunlap@...radead.org>,
        Matthew Wilcox <willy@...radead.org>, viro@...iv.linux.org.uk,
        axboe@...nel.dk, bcrl@...ck.org, Jonathan Corbet <corbet@....net>,
        virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
        kvm@...r.kernel.org, linux-aio@...ck.org,
        linux-fsdevel@...r.kernel.org
Subject: Re: Re: [RFC v3 11/11] vduse: Introduce a workqueue for irq injection

On Tue, Jan 26, 2021 at 4:17 PM Jason Wang <jasowang@...hat.com> wrote:
>
>
> On 2021/1/19 下午1:07, Xie Yongji wrote:
> > This patch introduces a dedicated workqueue for irq injection
> > so that we are able to do some performance tuning for it.
> >
> > Signed-off-by: Xie Yongji <xieyongji@...edance.com>
>
>
> If we want the split like this.
>
> It might be better to:
>
> 1) implement a simple irq injection on the ioctl context in patch 8
> 2) add the dedicated workqueue injection in this patch
>
> Since my understanding is that
>
> 1) the function looks more isolated for readers
> 2) the difference between sysctl vs workqueue should be more obvious
> than system wq vs dedicated wq
> 3) a chance to describe why workqueue is needed in the commit log in
> this patch
>

OK, I will try to do it in v4.

Thanks,
Yongji